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Non-Derivative Fair Value Measurements - Nonrecurring Fair Value Measurements (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Dec. 31, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Investment in equity method investees $ 5,991.0   $ 6,582.0
Equity method investment, impairment 1,200.0    
Equity method investment, impairment, net of tax $ 900.0    
NextEra Energy Resources      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Trading price (per share) $ 29.70    
Investment in equity method investees $ 4,200.0    
Equity method investments, fair value $ 3,000.0    
Mountain Valley Pipeline | NextEra Energy Resources      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Impairment charge   $ 800.0  
Impairment charge, net of tax   600.0  
Equity method investments, write off   600.0  
Equity method investments, liability   $ 200.0